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I have had a similar smell myself. It has happened several different times even when there are no cars around. I did put Spectra in my Tranny when I changed my clutch cable. It's not bad and does not stay around long. And no leaks that I can find. No marks on the garage floor.
I should ask however, is it gear oil or really hot motor oil your smelling and do you see any signs of a leak?
Thanks for all the replies. It's definately gear oil... there's no mistaking that smell. There are no leaks. I changed the gear oil about 750 miles ago. Put in Amsoil 75w-140.
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